Merge tag '4.4-fix' of git://git.lwn.net/linux

Pull documentation fix from Jon Corbet:
 "A single fix from Mauro for a 4.4 regression that would cause the docs
  build to fail on systems with ancient Perl installations"

* tag '4.4-fix' of git://git.lwn.net/linux:
  kernel-doc: Make it compatible with Perl versions below 5.12 again